Explosion-motor.



No. 639,160. Patented Dec. l2, I899.

E. FESSARD.

EXPLOSION MOTOR.

(Application filed Jan. 31', 1899.)

3 sheets sheet (No Model.)

VITA/E6556:

51/6 ENE FEJ-MRZ? fl/S 1727012111576.

In: NORRIS vzrzns co, wnoxaurna. WASHINGTON, n, c.

Patented Dec. l2, I899.

E. FESSARD.

EXPLOSION MOTOR.

(Application filed Jan. 31, 1899.) (No Model.) 3 Sheets-Sheet 2.

m: NORRIS Pawns co morommu. \VASHINGTON, u. c.

' been applied.

taken at right angles to that in Fig. l and passing along the axis ofone of the two cylin- UNTTED STATES PATENT GFTICE.

EUGENE FESSARD, or POISSY, FRANCE.

EXPLOSION-MOTOR.

SPECIFICATION forming part of Letters Patent No. 639,160, dated December12, 1899. Application filed Janua y 31, 1899. Serial No. 703,998. (Nomodel.)

1'0 all whom it may concern:

Be it known that I, EUGENE FESSARD, a citizen ofthe Republic of France,residing in Poissy, Seine-et-Oise, France, have invented certainImprovements in Explosion-Motors, of which the following is aspecification.

This invention relates to improvements in gas or hydrocarbonexplosion-motors with the object of insuring their operation.

In order that my invention may be readily and clearly understood, I willnow describe it with reference to the accompanying drawings, in which-Figure l is a vertical section through a twocylinder motor to which myinvention has Fig. 2 is a vertical section ders. Fig. 3 is a horizontalsect-ion taken upon the line 3 3 of Fig. 1. as seen from above, of theend of the two cylinders of the motor.

A and A are the two cylinders, which are surmounted by the cylinder ends13 and B,

each of which comprises an admission-valve a, an exhaust-valve Z), anignition device 0, and a starting-cock d.

O and O are the pistons, connected by connectingrods D and D to thesingle crank of the driving-shaft E, which is carried by bearings e ande, fixed upon the lid of a gear case or envelop F, upon which are fixedthe cylinders A and A and which is provided with lugs ff for mountingthe motor. At the upper portion of each cylinder is provided apartition-memhrane g, compelling the fresh gas admitted by the valve ato force before it when suction takes place the burned gases which maybe within the cylinder and not permitting it to mingle with them in theadmission-pipe 72. It follows that the ignition of the gas takes placeunder the best possible conditions.

The main feature of my present invention consists in the constructionadopted for operating the exhaust valves. This operating mechanismconsists of a cam G, which is rigidly attached to the crank of thedriving-shaft E between the two connecting-rods D and D and having ascenter of rotation the axis of the said shaft itself. This cam providestwo Fig. 4 is a plan view,

paths intersecting at a single point at. Its construction presents nopeculiarity and is well known. Above this cam is arranged a lever H,provided with a rotating roller 7Z2, engaged in its groove in the form.of the figure 8. This lever is jointed upon the casing F by means of twoperpendicular pivots e t", which enable it to follow,by means of itsroller 71 the various reliefs of .the cam and the 8-shapedconfiguration. It follows from this that there is imparted to the leverboth a vertical and a horizontal displacement at the same time. Thishorizontal movement transports the free extremity of the lever 11 from 1to 2, and it is in each of these positionsthat it is submitted tovertical movement. Upon the right hand of these points 1 and 2 are therodsj andj of the exhaust-valves, which, as is apparent, are alternatelysubmitted to the action of the cam G, which serves to lift them everysecond revolution in order to effect the exhaust. It will be noticedthat while one of the cylindersis in the exhaust stage the othercylinder is in the compression stage and that the two pistons, althoughreceiving contrary impulses, act in unison and produce a uniform drivingaction. It will also be noticed that the casing F is provided with twosmall coverplates 19 p, which when removed enable the lever H tobeinspected and, if necessary, dismounted.

The oasing F is combined with a bellows S, formed of leather after themanner of a forgebellows and of a suitably-undulated metal sheet. Thisbellows is acted upon by the pressures and reduction of pressure whichtake place within the casing-that is to say, it becomes inflated ordeflated in accordance with the direction of the stroke of the pistons.In these conditions the oil with which the casing F is partially filledis isolated from the alternate compressions of the air contained withinthe said casing and has no tendency to escape into the atmosphere, as isordinarily the case. Leakage of oil is thus obsary to raise the valveevery second revolution in any case. In this case the lever is raised inspace at one of the two revolutions.

I claim as my invention- 1. The combination with an exhaust-valve androd connected thereto, of a lever for operating the valve, free at thevalve end and mounted on auniversal joint at the other end and acontrolling-cam operating upon the lever between its ends and so formedas togive the lever in succession a lateral and a vertical movement.

2., An explosion-motor having two cylinders, a shaft, a cam withS-shaped grooves on said shaft, eXhaust-valves,rods to said valves,

